javascript
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three.js
镜像来自 https://github.com/tazdij/three.js.git


			
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		[page:Object3D] &rarr; [page:Light] &rarr;

		<h1>[name]</h1>

		<p class="desc">
			RectAreaLight emits light uniformly across the face a rectangular plane. This light type can be
			used to simulate light sources such as bright windows or strip lighting.<br /><br />

			Important Notes:
			<ul>
				<li>There is no shadow support.</li>
				<li>Only [page:MeshStandardMaterial MeshStandardMaterial] and [page:MeshPhysicalMaterial MeshPhysicalMaterial] are supported.</li>
				<li>You have to include [link:https://threejs.org/examples/js/lights/RectAreaLightUniformsLib.js RectAreaLightUniformsLib] into your scene.</li>
			</ul>
		</p>


		<h2>Examples</h2>

		<p>
			[example:webgl_lights_rectarealight WebGL / rectarealight ]

			<code>
var width = 10;
var height = 10;
var intensity = 1;
var rectLight = new THREE.RectAreaLight( 0xffffff, intensity,  width, height );
rectLight.position.set( 5, 5, 0 );
rectLight.lookAt( 0, 0, 0 );
scene.add( rectLight )

rectLightHelper = new THREE.RectAreaLightHelper( rectLight );
scene.add( rectLightHelper );

			</code>
		</p>


		<h2>Constructor</h2>


		<h3>[name]( [param:Integer color], [param:Float intensity], [param:Float width], [param:Float height] )</h3>
		<p>
			[page:Integer color] - (optional) hexadecimal color of the light. Default is 0xffffff (white).<br />
			[page:Float intensity] - (optional) the light's intensity, or brightness. Default is 1.<br />
			[page:Float width] - (optional) width of the light. Default is 10.<br />
			[page:Float height] - (optional) height of the light. Default is 10.<br /><br />

			Creates a new [name].
		</p>

		<h2>Properties</h2>
		<p>
			See the base [page:Light Light] class for common properties.
		</p>

		<h3>[property:Boolean isRectAreaLight]</h3>
		<p>
			Used to check whether this or derived classes are RectAreaLights. Default is *true*.<br /><br />

			You should not change this, as it used internally for optimisation.
		</p>

		<h2>Methods</h2>
		<p>
			See the base [page:Light Light] class for common methods.
		</p>


		<h3>[method:RectAreaLight copy]( [param:RectAreaLight source] )</h3>
		<p>
		Copies value of all the properties from the [page:RectAreaLight source] to this
		RectAreaLight.
		</p>

		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
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